The Nassau County, New York district attorney's office said that five "test takers" and 15 "payers" had now been charged, CNN reported.

Michael Pomerantz, 18, a "test taker" who received a 1710 on a SAT exam he took for another student, surrendered at 7 a.m. Monday, [spokesman John] Byrne said.

Another student "payer," whose identity is concealed because of age, also surrendered Monday and will face misdemeanor charges.

Pomerantz, USA Today reported, is one of five current or former students at Great Neck-area public and private high schools charged with impersonating other students on the tests between 2008 and 2011.

He faces felony charges including scheming to defraud, falsifying business records and criminal impersonation, which could amount to a four-year jail term.

Another of the accused, George Trane, who attends State University of New York Stony Brook, reportedly scored a 29 and a 28 on ACT exams he took for two separate students, CNN reported, adding that the highest composite score of an ACT exam is 36 points.

Sam Eshaghoff, a graduate of Great Neck North High School who was arrested in September, was included in the court roster Monday, according to Newsday.

The investigation into the cheating ring reportedly began when administrators at Great Neck North High School discovered that six students had paid a seventh to take the standardized test for them.